Determination of the Killer Characteristics of Wine-Yeast Strains Isolated from Different Areas

Authors: Filiz ÖZÇELİK, Uğur TÜRKMEN, Sevcan ATEŞ

Abstract: In order to introduce a wine yeast with killer or neutral characteristics, yeasts isolated from different wine regions of Turkey were examined for killer, sensitive, neutral and killer-sensitive characteristics. From a total of 73 yeasts, 60 yeasts were determined as being sensitive, while 13 yeasts were neutral. The neutral yeasts were found to be unsuitable for use as wine yeasts since they could not complete the alcoholic fermentation of grape must and their fermentation rates were very slow.

Keywords: Killer yeast, sensitive yeast, neutral yeast, Saccharomyces cerevisiae, wine fermentation